0020716: Eliminate usage of "config.h" header file

All inclusions of "config.h" were removed.

All places where macros defined by config.h were checked and removed

Small corrections for mac os.

Unused code in file OSD_Disk.cxx was removed.

Unused macros and includes were removed from samples and code.

Added necessary includes for MacOS.

Correct new additional compilation warning on Linux platform.

Fix for error in OSD_Chronometer on Debian70/Fedora18

src/ViewerTest/ViewerTest_RelationCommands.cxx

@@ -15,9 +15,6 @@
 // commercial license or contractual agreement.
 
 #include <ViewerTest.hxx>
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
 
 #include <AIS_AngleDimension.hxx>
 #include <AIS_Circle.hxx>
@@ -57,7 +54,6 @@
 #include <Precision.hxx>
 #include <Select3D_Projector.hxx>
 #include <StdSelect.hxx>
-#include <string.h>
 #include <TCollection_AsciiString.hxx>
 #include <TCollection_ExtendedString.hxx>
 #include <TColStd_MapOfInteger.hxx>
@@ -82,10 +78,6 @@ extern ViewerTest_DoubleMapOfInteractiveAndName& GetMapOfAIS();
 extern int ViewerMainLoop(Standard_Integer argc, const char** argv);
 extern Handle(AIS_InteractiveContext)& TheAISContext ();
 
-#ifdef HAVE_STRINGS_H
-# include <strings.h>
-#endif
-
 #define VertexMask 0x01
 #define EdgeMask 0x02
 #define FaceMask 0x04